Looseboy (るーすぼーい, Rūsubōi) is the writer for the original manga of Talentless Nana. He is a game scenario writer of notable visual novels like Sharin no Kuni, A Profile, and G-Senjou no Maou, all developed by the Japanese company AkabeiSoft2.
A message from Looseboy:
"'When I visited the meeting for the anime production, I was surprised to know, 'So many different people are involved.' As far as I could see, the manga, which had only an editor and the illustrator Furuya-san, actually have connected a lot of people. It was also the time that I reconfirmed the support of all those involved in the publication of the series and tankobons, and above all readers. I appreciate everyone. Please look forward to seeing the action of Nana, Kyouya, and Nakajima who will move and talk in the anime." (Source)